One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(6,8)(10,14)(11,16)(19,23)(22,24)(25,26,30,31)(27,35,36,32)(28,37,38,33)(29,39,40,34)(1,2,4,5)(3,6,7,8)(9,10)(11,12)(13,14)(15,16)(18,21)(22,24)(26,31)(27,36)(33,37)(34,39)(3,7)(6,8)(10,14)(12,15)(17,18,20,21)(19,22,23,24)(25,27,30,36)(26,32,31,35)(28,34,38,39)(29,37,40,33)(1,2)(3,8)(4,5)(6,7)(9,11,13,16)(10,15,14,12)(17,19)(18,22)(20,23)(21,24)(25,28,30,38)(26,33,31,37)(27,34,36,39)(29,35,40,32)(1,3,4,7)(2,6,5,8)(9,12,13,15)(10,11,14,16)(25,29)(26,34)(27,33)(28,32)(30,40)(31,39)(35,38)(36,37)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.